Improved mill-buek deesser



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WILLIAM I. STALCUP, F BROOKVILLE, INDIANA, ASSIGNOR TO HIMSEIIJI? AND JOHN P. LANCASTER, OF SAME PLAGE.

Laim Patent No. 79,373, dated october 29, 18er.

IMPROVED v4lllIILL-BUIlR DRESSERl @its Stimuli referat tu in tlgese fritas attnt rut mating part nf its stmt.

TO ALL WHOM IT MAY CN CERN Be it known that I, WILLIAM P. STALCUP, of Brookville, in the county of Franklin, and State of Indiana, have invented a new and improved llIillBurrlDrcsser; and I do hereby declare the following to be a full, clear,

Vand exact description of the same, reference being had to the accompanying drawings, forming part of this specification, and in which- Figure 1 s a top view of my invention. Figure 2 is a detachediview of appart of my inventon,rshowing the mechanism for throwing the travelling wheel into and outof gear with the rack.

Figure 3 is an end elevation of the invention, and Figure 4 is a view of the instrument by which I adjust the dresser to work the upper stone or runner exactly from its centre. Y

Thisinvention isa machine for dressing millstones, or for smooth-dressing or channelling and moulding building-stones. The improvementover other machines for the purpose consists in a new arrangement of the machinery, whereby better results are obtained, and several new devices by which, when used for dressing mill-burrs, the formation of thedress is regulated and controlled so as to produce amore perfect millstone than has ever been before made. Similar letters of reference indicatecorrespondng parts in the several figures. In the drawings, A representa rectangular frame of iron, the under side of which is perfectly straight A and'smooth, for thepurpose of enabling the operator to determine when the dress of his stone is nished, and-to the sides of this frame are fastened upright plates B B, the upper edges of which are formed into a rack, cZ d. A cleat, C, fastened to the inside of these plates, and haring its lower edge parallel with the` upper surface ot' the frame A, and near to it, forms'a recess orrebate, r r, which acts 'as a way or guide for the operating partei' the machine to travelback and forth in, vfrom one end of the frame to the other, when in operation. D Dis the sliding frame which travels back and forth between `the upright plates B B,carrying the machinery, and providcd with anges projecting outward from the bottom of its side pieces, and working in the recesses r i', to'

guide iti back and forth. Extending across the horizontal sliding frame D, is a crank-shaft, E, having two cams c ei', which operate i'n opposite directions, and alternately raise and drop a vertical sliding frame F, which -carries the cutting tool K. Thecams are arranged upon a sleeve, o, by which one or the other may be made to operate the frame F, the shaft E working in either direction. G are upright guides or ways fixed to the frame'D, in which the vertical frame F slidesv up and down. F is an arm extending from the frame F to the cams, against which the latter strikes to raise the frame. F is a spiral screw for increasing or diminishing the force of the cutting tool, and isitseli` regulated by the hand-screw F, by which it may be given any degree of tension. A set-screw, operating under the frame E', may be provided to arrest the fall of the frame at any required poiu't. The frame D thus constructed, and supporting all the working parts of the machine, as above described, is moved black and forth along the track a* r, by means of a pinion, u, on the main shaft E, working large spur-wheel, w, attached to a short shaft, the other end of which hears a gear-wheel, mfwhich travels'n the rack b. The wheel w, its shaft, and the small wheel m, are all held by a lever, L, in which the -shaft bears at its centre, and which enables the operator to raise the wheel m from the-rack at pleasure. When the wheel is in gearwith theraclc, the rotation of the shaft E causes it to travel along the rack, sliding the `frame D back and forth, and carrying the cutting tool K from the centre to the edge of the millstcne and back and forth as desired. This constitutes the mechanism by which the cutting of the stone is eifected.

:In order to cause the dress to take the proper form, I provide a slot, s, extending across the end of the ,frame A, and a loop, O, fixed-by a setlscrew, n, at'any point in the slot This loop, in dressing the bed-stone, is fixed over or around the spindle, as shown in iig. 2. AIn dressing the runner the stone is inverted, and' the instrument shown in iig. 4 is inserted'in the eye, and fixed in the centre by means of set-screws This instrument consists of a rod, I, provided with four 4bent horizontal arms VV V V, and bearing a cylindrical wooden block, I', fitted to exactly ll `the loop 0. The lower' end of therod I screws into and through the in the manner and for the purposes specified.

upper arm of the bent piece P, (fig. 4,)'and its extremity is ground to a nice point, whiclris accurately adjustedl in the clock-eye, as shownin the drawings. The set-screwp is then screwed up i'irmlya'gainst lthe balancerynd on the side opposite to that with which the rod I is in contact. rEhis fixes the rod I and block I exactlyin the axis of the millson'e, and enables the operator to dress the stone withv perfect accuracy.l Fig. 4 shows the instrument in position and 'the loop O adjusted for practical operation. Y

In dressing millstones great care and judgment must be exercised,- and each stone dressed according to its quality and siz-e. A stone which is of ine quality will receive a. line dress, while a coarse stone will not, ,but the dress must be adapted'to its coarser quality.. A large stone, too, must be dressed with a heavier draught than a small one.` My invention is particularly'des'igned to meet all Ithese wants, and is adapted to dressing every kind of stone, of whateverl size required. For instance, if the stone is small, and hut little draught is needed, the loop O mustbe adjusted towards the ends ls ofthe slot,` and when adjusted at the extremity of the slot on that side, will dress the furrows to the vcr-.y edge of the eye. 0n the-otherhand, 'when aheavy draught is required, the loop must be adjusted towards the opposite endof the slot. It is obvious that any required draught can be given in this manner, and'one kind as easily as another. The loop Ofmay be attached so as to project outward from the frame A, as shown iu fig. 1, or it may be extendedin the opposite direction, the frame enclosing the eye of the stone. i

In dressing building-stones, two straight-edges are to be adjusted tothe stone, one on each side, and the frame A placed across over them, the cut of the tool being adjusted as desired. The-cutting instrument will then work the stone down until it is perfectly level between the straight-edges. By gearing or ungearing the wheel m and rack b, and properly working the instrument, it may be vmade to dress of? stoncto a flat surface, or to mortise, bevel, channel, llnte, or otherwise prepare it forfits intended use. l

Instead ofthe slot s, a r'aised ledge across the end ofthe frame A may be employed in its place, or the end of the' frame may be fashioned to act as such a ledge, and the loop O adjusted along it bymeans of a horizontal sot-screw. l

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. The slot s in the frame A, substantially as and for-the purpose specified.

2. The instrument above described for adjusting the loop O accurately to the centre of the runner,- when constructed and operating substantially in the manner and for the purpose required.

3. The loop O, when providedl with a set-screw, and used in -connection'with the frame A, to regulate the draught ofthe dress, substantiallyas described. j

4. The tempering arrangement, consisting ofthe screw-rod F and screw F, when used in connection with the frame F to regulate the force of the cutting tool K, substantially as described.

5. The sleeve 0,l bearing the two cams e e, when used upon Athe working shaft of a stone-dressing`machine to enable it to dress in both directions, substantially as set forth. v l

G. The stone-dressing machine above described, consisting ofthe frame A, horizontal sliding frame D, vertical sliding frameF, bearing the tool K, shaft E, bearing the sleeve o, two cams e e, rack b, and gear-Wheels u w m adjusted by means of lever L,- all the said parts being constructed, arranged, and combined substantially' WILLIAM r. srALeUP.

Witnesses:

JAMES H. Gummi', NATHAN K. ELLsWo-n'rn. 

